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Samples used in statistical analyses, including the number of skin samples per population, the age range of infants, the range of household size (including the infant), and the range of alloparents reported per infant
| Population | No. skin samples | Age (mo) | Mean age (mo) | Household size | Alloparents |
|---|---|---|---|---|---|
| All populations combined | 119 | 0.5–33 | 11.8 | 3–14 | 0–9 |
| Urban USA | 65 | 5–13 | 10.2 | 3–5 | 0–4 |
| Urban MEX | 18 | 3–33 | 15.7 | 3–4 | 1–3 |
| Peri-urban MEX | 14 | 0.5–18 | 8.8 | 3–7 | 1–3 |
| Rural MEX | 22 | 2.5–32 | 12.9 | 3–14 | 0–9 |
